What term is used to describe a rich, full sound?

The term "sonore" is used to describe a rich, full sound in music, often associated with depth and warmth in tone. This term encapsulates a quality that enhances the listening experience, suggesting a sound that is pleasingly resonant and vibrant. Musicians might seek to achieve a sonore quality through careful control of their instrument or voice, engaging techniques that foster depth and fullness.

In contrast, "fortissimo" refers specifically to a dynamic level that indicates very loud sound, "acuto" denotes high pitches, and "vibrato" describes a technique involving slight variations in pitch to add expressiveness, but none of these terms directly convey the sense of richness and fullness captured by "sonore." Thus, this choice perfectly aligns with the description of a sound that is both robust and harmonious.